CNN Forensic Files May 17, 2015 06:27:00
They said that if you have a .45 caliber handgun, please let me know. he says we got two. i said keep 'em. planten's two .45 caliber guns were test fired. analysts were especially interested in the marks on the shell casings. imperfections from the firing pin are imprinted on the shell casing back when it's fired. and the imperfections on each firing pin are unique to each one made. and each are unique to each g when the shell casing was compared to the shell casing from drew planten's gun, the results were unmistakable. >> some very well defined linear
Source: archive.org